Q. Do you have books on Bernard Lonergan? He discusses causality in the field of metaphysics.

Yes, we have the Lonergan Reader which has a chapter on metaphysics. See the link below for details and availability for the book.

You can also find journal articles in Academic Search Complete, ATLA Religion Database and Religion and Philosophy Collection

If you search Lonergan AND Metaphysics you will definitely find some articles

Adding the Causality aspect doesn't bring up many results but a few articles can be found in some of the databases if you search on Lonergan AND Metaphysics AND Causation (rather than Causality)